Navigation Links
Modern shift work pattern potentially less harmful to health

Recent research suggests that the modern day-day-night-night shift pattern for shift workers may not be as disruptive or as potentially carcinogenic as older, more extreme shift patterns.

"Recent research has suggested shift work could increase the risk of cancer, although the biological mechanism responsible for this observation is still unknown," says Anne Grundy, the paper's lead author and a doctoral student in the Department of Community Health and Epidemiology. "Our study indicates that the now common rotating shift pattern of day-day-night-night may not disrupt circadian rhythm or melatonin production significantly."

Melatonin is a hormone that has been shown to have anti-oxidant and tumor suppressor qualities. Since the production of melatonin is tied to the light-dark cycle and peaks between midnight and 4am, shift workers who are exposed to light at night may have an increased risk of diseases like cancer.

Ms. Grundy and her research colleagues recruited 123 female shift workers at Kingston General Hospital (KGH). They tested the participants to determine both their peak melatonin levels and the overall change in their melatonin levels during a winter day shift and night shift and a summer day shift and night shift. During these testing periods, the participants wore light meters that objectively measured the surrounding light intensity.

The researchers found that the light level in the KGH wards at night is generally dim and that there is little difference in peak melatonin levels in shift workers working during the day or night shift. However, in instances where the levels of light increased during a night shift, the workers'overall change in melatonin levels decreased slightlya finding that is statistically significant.

"We've already seen a shift away from the older patterns of two weeks of days, two weeks of nights, and a short time off to more humane patterns of day-day-night-night then five days off, so it's possible that an intervention to combat the health risks of shift work has already occurred," says Ms. Grundy. "However, the overall change in melatonin levels that we found may still be a concern. We look forward to seeing other studies that either confirm our findings or that examine the impact of specific risk factors like extreme shift patterns and higher intensities of light at night."

Contact: Christina Archibald
Queen's University

Related medicine news :

1. Electronic Merchant Systems Modernize Medical Billing
2. Learn to Dance in a Day -- Beginner Workshop Launches Modern Jive in Toronto
3. 24x7 Infection Control, Inc. Announces World's First, Modern “Shield” Against Microbial Contamination
4. Bick Group Launches Leveraging Cloud Computing Within the Modern Data Center Webinar Series
5. Leonardos anatomical sketches fascinate modern-day anatomist
6. iVillage Prescribes New Health Site for the Modern Woman
7. Bloomberg School of Public Health awarded $15 million for laboratory renovation and modernization
8. Modern medicine conquers witchcraft
9. Denver Plastic Surgeon Deploys Sophisticated Lasers in Modern Beauty, Anti-aging Treatments
10. The New 2010 Modernized Medicare Supplement Plans: Positive Changes in the Midst of Health Care Reform
11. Action of modern drug demonstrates how 2 ancient human systems interact
Post Your Comments:
(Date:11/28/2015)... ... , ... Safe storage for contraceptive devices may not always be easy to ... and the other from Bradley Beach, New Jersey, there is an easy solution to ... to replace NuvaRings more often than necessary. As such, it affords peace of mind ...
(Date:11/27/2015)... ... November 28, 2015 , ... There is only one major question facing ... last year? , This question has not been an easy question to answer. Especially ... age and the younger workforce don’t share the same discipline around working long hours. ...
(Date:11/27/2015)... ... 27, 2015 , ... The rapid speed at which Americans ... more care is needed, especially with Alzheimer’s, dementia and other cognitive conditions becoming ... The forgotten part of this equation: 80 percent of medical care occurs in ...
(Date:11/27/2015)... ... 27, 2015 , ... Lizzie’s Lice Pickers just announced a special promotion that ... of their purchase of lice treatment product. In addition, customers will receive a complimentary ... spokesperson. “Finding lice is a sure way to ruin the holidays, so we encourage ...
(Date:11/27/2015)... , ... November 27, 2015 , ... ... of progress through sharing, the 2016 Building Better Radiology Marketing Programs ... will begin on Sunday, March 6, 2016, at Caesars Palace in Las Vegas ...
Breaking Medicine News(10 mins):
(Date:11/26/2015)... Nov. 26, 2015 Research and Markets ... the "2016 Future Horizons and Growth Strategies ... Supplier Shares, Country Segment Forecasts, Competitive Intelligence, Emerging ... --> --> This ... the Italian therapeutic drug monitoring market, including emerging ...
(Date:11/25/2015)... , Nov. 25, 2015  Amgen (NASDAQ: AMGN ... Application (BLA) with the United States ... 501, a biosimilar candidate to Humira ® (adalimumab). ... application submitted to the FDA and represents Amgen,s first ... Sean E. Harper , M.D., executive vice president of ...
(Date:11/25/2015)... Nov. 25, 2015  ARKRAY USA ... to provide evidence demonstrating the accuracy of its blood ... on Insulin Resistance, Diabetes and Cardiovascular Disease in ... the Company,s GLUCOCARD ® 01 meter and the ... requirements. The ability to accurately measure glucose levels in ...
Breaking Medicine Technology: